G4523 Σαδδουκαῖος

Dodson:

Σαδδουκαῖος: a Sadducee; a Sadducee, a member of the aristocratic party among the Jews, from whom the high-priests were almost invariably chosen.

Strong's:

Σαδδουκαῖος: a Sadducæan (i.e. Tsadokian), or follower of a certain heretical Israelite
Derivation: probably from G4524;
KJV Usage: Sadducee.
G4524

TBESG:

Σαδδουκαῖος: Sadducee; N:N--T; Σαδδουκαῖος, -ου, ὁ
(< Heb. צָדוֹק, 2Ki.15:24, al.),
a Sadducee (cf. Swete, Mk., 277):
Refs
Mat.3:7 16:1, 6 16:11-12 22:23-34 Mrk.12:18, Luk.20:27, Act.4:1 5:17 23:6-8
.†
(AS)

Thayer:

1) a religious party at the time of Christ among the Jews, who denied that the oral law was a revelation of God to the Israelites, and who deemed the written law alone to be obligatory on the nation, as the divine authority. They denied the following doctrines:
1a) resurrection of the body
1b) immortality of the soul
1c) existence of spirits and angels
1d) divine predestination, affirmed free will

Literal: Sadducees = "the righteous"